CN111432456A - Terminal residing method, mobile management entity, base station, system and storage medium - Google Patents
Terminal residing method, mobile management entity, base station, system and storage medium Download PDFInfo
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- CN111432456A CN111432456A CN202010251788.9A CN202010251788A CN111432456A CN 111432456 A CN111432456 A CN 111432456A CN 202010251788 A CN202010251788 A CN 202010251788A CN 111432456 A CN111432456 A CN 111432456A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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Abstract
The embodiment of the invention discloses a method for terminal residence, a mobile management entity, a base station, a system and a storage medium. The terminal residing method is applied to a Mobile Management Entity (MME), and comprises the following steps: determining a radio access type/frequency selection priority RFSP identification information ID based on preset service requirement information; and transmitting the RFSP ID to the base station for the base station to determine frequency band priority information based on the RFSP ID, and transmitting the frequency band priority information to the terminal for the terminal to determine a resident frequency band based on the frequency band priority information. According to the embodiment of the invention, the terminal can be quickly and efficiently accessed to the 5G network.
Description
Technical Field
The invention belongs to the field of communication between a core network and a wireless network, and particularly relates to a terminal residing method, a mobile management entity, a base station, a terminal residing system and a computer storage medium.
Background
At present, in a Non-independent Networking (NSA) architecture of a fifth generation Network (5G Network ), a terminal needs to access a 4G Network at the same time, and signaling interaction of a core Network is anchored to a 4G base station for processing.
However, the commercial frequency bands of the 4G network are numerous, the long term evolution (L ong termEvolution, L TE) supported by each communication manufacturer has different capabilities of anchoring the frequency bands, and the commercial time of the terminal chips of each anchoring frequency band is different, so that the terminal needs to perform frequent cell reselection and handover to access the 5G network, which results in a long access delay of the terminal to access the 5G network.
Therefore, how to enable the terminal to access the 5G network quickly and efficiently becomes an urgent technical problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a terminal residing method, a mobile management entity, a base station, a terminal residing system and a computer storage medium, which can enable a terminal to be accessed to a 5G network quickly and efficiently.
In a first aspect, a method for a terminal to reside is provided, which is applied to a Mobility Management Entity (MME), and includes:
determining identification Information (ID) of Radio access technologies/Frequency Selection Priority (RFSP) based on preset service requirement information;
transmitting the RFSP ID to a base station for the base station to determine frequency band priority information based on the RFSP ID, and transmitting the frequency band priority information to a terminal (UE) for the terminal to determine a camping frequency band based on the frequency band priority information.
Optionally, after transmitting the RFSP ID to the base station for the base station to determine the frequency band priority information based on the RFSP ID, and transmitting the frequency band priority information to the terminal for the terminal to determine the camping frequency band based on the frequency band priority information, the method further includes:
updating the RFSP ID according to the service demand information;
and transmitting the updated RFSP ID to the base station.
Optionally, before transmitting the RFSP ID to the base station, the method further includes:
sending a terminal location acquisition request to a Home Subscriber Server (HSS);
receiving terminal position information corresponding to a terminal position acquisition request sent by an HSS;
the base station is determined based on the terminal location information.
Optionally, sending a terminal location obtaining request to the HSS, including:
sending an authentication data request to the HSS;
receiving authentication data corresponding to an authentication data request sent by an HSS;
and when the authentication aiming at the terminal is completed according to the authentication data, sending a terminal position acquisition request to the HSS.
In a second aspect, a method for a terminal to camp on is provided, which is applied to a base station, and includes:
receiving an RFSP ID sent by an MME; wherein, the RFSP ID is information determined by the MME based on preset service requirement information;
determining frequency band priority information based on the RFSP ID;
and sending the frequency band priority information to the terminal, so that the terminal can determine the resident frequency band based on the frequency band priority information.
Optionally, after sending the frequency band priority information to the terminal for the terminal to determine the camping frequency band based on the frequency band priority information, the method further includes:
receiving an updated RFSP ID sent by an MME;
determining updated frequency band priority information based on the updated RFSP ID;
and sending the updated frequency band priority information to the terminal, so that the terminal can update the resident frequency band based on the updated frequency band priority information.
In a third aspect, a mobility management entity is provided, including:
the determining module is used for determining the RFSP ID based on preset service requirement information;
and the sending module is used for sending the RFSP ID to the base station, so that the base station determines the frequency band priority information based on the RFSP ID, and sending the frequency band priority information to the terminal, so that the terminal determines the resident frequency band based on the frequency band priority information.
Optionally, the sending module is further configured to update the RFSP ID according to the service requirement information; and transmitting the updated RFSP ID to the base station.
Optionally, the determining module is further configured to send a terminal location obtaining request to the HSS; receiving terminal position information corresponding to a terminal position acquisition request sent by an HSS; the base station is determined based on the terminal location information.
Optionally, the determining module is further configured to send an authentication data request to the HSS; receiving authentication data corresponding to an authentication data request sent by an HSS; and when the authentication aiming at the terminal is completed according to the authentication data, sending a terminal position acquisition request to the HSS.
In a fourth aspect, a base station is provided, comprising:
a receiving module, configured to receive an RFSP ID sent by an MME; wherein, the RFSP ID is information determined by the MME based on preset service requirement information;
the determining module is used for determining frequency band priority information based on the RFSP ID;
and the sending module is used for sending the frequency band priority information to the terminal so that the terminal can determine the resident frequency band based on the frequency band priority information.
Optionally, the sending module is further configured to receive the updated RFSP ID sent by the MME; determining updated frequency band priority information based on the updated RFSP ID; and sending the updated frequency band priority information to the terminal so that the terminal can update the resident frequency band based on the updated frequency band priority information.
In a fifth aspect, a system for a terminal to reside is provided, including:
a mobility management entity provided in the third aspect and a base station provided in the fourth aspect.
A sixth aspect provides a computer storage medium having computer program instructions stored thereon, the computer program instructions, when executed by a processor, implementing the method of the first aspect or the method of the terminal residing in any of the optional implementations of the first aspect; or the like, or, alternatively,
the computer program instructions, when executed by a processor, implement the method of the second aspect as such or as a terminal resident in any of the alternative implementations of the second aspect.
The terminal residing method, the mobile management entity, the base station, the terminal residing system and the computer storage medium of the embodiment of the invention can enable the terminal to be accessed to the 5G network quickly and efficiently. The terminal residing method determines an RFSP ID based on preset service requirement information, sends the RFSP ID to a base station for the base station to determine frequency band priority information based on the RFSP ID, and sends the frequency band priority information to a terminal for the terminal to determine a residing frequency band based on the frequency band priority information, solves the problem that the terminal in the prior art needs frequent cell reselection and switching to access a 5G network, and further enables the terminal to access the 5G network quickly and efficiently.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for terminal to camp on according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating another method for terminal to camp on according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating determination of a camping frequency band according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for terminal to camp on according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a mobility management entity according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
At present, in a Non-independent Networking (NSA) architecture of a fifth generation Network (5G Network ), a terminal needs to access a 4G Network at the same time, and signaling interaction of a core Network is anchored to a 4G base station for processing.
However, the commercial frequency bands of the 4G network are numerous, the long term evolution (L ong termEvolution, L TE) supported by each communication manufacturer has different capabilities of anchoring the frequency bands, and the commercial time of the terminal chips of each anchoring frequency band is different, so that the terminal needs to perform frequent cell reselection and handover to access the 5G network, which results in a long access delay of the terminal to access the 5G network.
In order to solve the problem of the prior art, embodiments of the present invention provide a terminal residing method, a mobility management entity, a base station, a terminal residing system, and a computer storage medium. The method for terminal residence according to the embodiment of the present invention is first described below.
Fig. 1 is a flowchart illustrating a method for terminal to camp on according to an embodiment of the present invention. As shown in fig. 1, the method for the terminal to camp on may include:
s101, determining an RFSP ID based on preset service requirement information.
S102, transmitting the RFSP ID to the base station for the base station to determine frequency band priority information based on the RFSP ID, and transmitting the frequency band priority information to the terminal for the terminal to determine a resident frequency band based on the frequency band priority information.
In order to meet the service requirement, in an embodiment, after sending an RFSP ID to a base station for the base station to determine frequency band priority information based on the RFSP ID, and sending the frequency band priority information to a terminal for the terminal to determine a camping frequency band based on the frequency band priority information, the method further includes: updating the RFSP ID according to the service demand information; and transmitting the updated RFSP ID to the base station.
To more accurately determine the base station, in one embodiment, before transmitting the RFSP ID to the base station, the method further comprises: sending a terminal position acquisition request to an HSS; receiving terminal position information corresponding to a terminal position acquisition request sent by an HSS; the base station is determined based on the terminal location information.
In order to improve the security of information transmission, in an embodiment, sending a terminal location acquisition request to the HSS may include: sending an authentication data request to the HSS; receiving authentication data corresponding to an authentication data request sent by an HSS; and when the authentication aiming at the terminal is completed according to the authentication data, sending a terminal position acquisition request to the HSS.
Fig. 2 is a flowchart illustrating another method for terminal to camp on according to an embodiment of the present invention, and as shown in fig. 2, the method for terminal to camp on may include:
s201, receiving an RFSP ID sent by an MME; wherein, the RFSP ID is information determined by the MME based on preset service requirement information.
S202, determining frequency band priority information based on the RFSP ID.
S203, sending the frequency band priority information to the terminal, so that the terminal can determine the resident frequency band based on the frequency band priority information.
The main execution body of the method for the terminal to camp on is a base Station, and optionally, the base Station may be an evolved node B (eNB). To meet the service requirement, in one embodiment, after transmitting the frequency band priority information to the terminal for the terminal to determine the camping frequency band based on the frequency band priority information, the method may further include: receiving an updated RFSP ID sent by an MME; determining updated frequency band priority information based on the updated RFSP ID; and sending the updated frequency band priority information to the terminal, so that the terminal can update the resident frequency band based on the updated frequency band priority information.
The following describes the above with an embodiment, which specifically includes the following steps:
in the method for residing the terminal provided in this embodiment, in the initial stage of deployment of the 5G network, when one or more frequency bands with the highest industrial chain maturity are selected as L TE anchor frequency bands from among a plurality of L TE frequency bands in the existing network, the 5G user attribute discovery capability is deployed on the core network, a frequency selection priority RFSP ID is provided to the 4G base station according to the capability, the 4G base station maps the acquired RFSP ID to a corresponding residing control policy and issues the mapping policy to the 5G NSA UE, so that the 5G NSA UE can preferentially reside and switch to a L TE anchor frequency band, and the 4G UE resides according to the original priority selection frequency band, thereby avoiding frequent cell reselection and switching of the 5G NSA UE, reducing network signaling and access delay, reducing terminal power consumption, and greatly improving user perception.
For example, as shown in fig. 3, the 5G NSA UE selects FDD1800 as L TE anchor band among two frequency bands (NR 2600 and FDD1800) with the highest industrial chain maturity, and the 4G UE selects the frequency band to camp on according to the original priority.
For different application scenarios, the method for the terminal to camp on in this embodiment is to configure "configure priority" information on the MME to determine the RFSP ID, and the UE preferentially switches to the frequency band determined based on the RFSP ID.
The terminal residing method can be applied to the following scenes:
(1) the application scene one: when the spectrum resource is in shortage, the operator can pass the user-based method
RFSP IDs are preconfigured with information such as International Mobile Subscriber Identity (IMSI) prefix to distinguish different Subscriber groups. And the resource use is controlled through the RFSP ID strategy so as to ensure the experience of a high-quality user.
(2) In an application scenario II, a standard language scheme for deploying a 5G independent networking (SA) architecture is VoNR and EPS Fallback, when the EPS Fallback scheme is adopted in an initial network deployment stage, a user mainly using voice frequently falls back to a 4G network, and when the user falls back to L TE, different system measurement and switching increase call establishment delay for about 1-2 seconds.
After encryption and integrity protection are completed, the MME sends a location update Request (U L R) to the HSS and receives a location update reply (U L A) responded by the HSS, the MME sends an Initial session establishment Request (Initial context setup Request) to the eNodeB to complete attachment (Attach accept), that is, based on the configuration priority information configured on the MME, the MME sends the flexibly configured RFSP ID to the eNodeB at this time, the eNodeB acquires the RFSP ID (that is, the SPID), and then sends the list to the terminal by configuring and maintaining the RFSP ID and the frequency band priority, and the terminal assists in switching and controlling the residence priority control box to the anchored L TE frequency band according to the list information.
When the RFSP ID configured by the MME is changed, the MME compares the RFSP ID with an actually used RFSP ID in the system, and if the result does not match, the MME issues a recalculated RFSP ID to the eNodeB through a session update request (UE context modification request). The eNodeB forwards the corresponding band priority list to the terminal again through a Downlink NASTransport message (Downlink NASTransport) according to the changed RFSP ID.
An embodiment of the present invention further provides a mobility management entity, as shown in fig. 5, where the mobility management entity may include:
a determining module 501, configured to determine an RFSP ID based on preset service requirement information.
A sending module 502, configured to send the RFSP ID to the base station, so that the base station determines frequency band priority information based on the RFSP ID, and send the frequency band priority information to the terminal, so that the terminal determines a camping frequency band based on the frequency band priority information.
Optionally, the sending module 502 is further configured to update the RFSP ID according to the service requirement information; and transmitting the updated RFSP ID to the base station.
Optionally, the determining module 501 is further configured to send a terminal location obtaining request to the HSS; receiving terminal position information corresponding to a terminal position acquisition request sent by an HSS; the base station is determined based on the terminal location information.
Optionally, the determining module 501 is further configured to send an authentication data request to the HSS; receiving authentication data corresponding to an authentication data request sent by an HSS; and when the authentication aiming at the terminal is completed according to the authentication data, sending a terminal position acquisition request to the HSS.
Each module in the mobility management entity provided in fig. 5 has a function of implementing each step in the example shown in fig. 1, and achieves the same technical effect as the method for terminal residence shown in fig. 1, and for brevity, no further description is given here.
An embodiment of the present invention further provides a base station, as shown in fig. 6, where the base station may include:
a receiving module 601, configured to receive an RFSP ID sent by an MME; wherein, the RFSP ID is information determined by the MME based on preset service requirement information;
a determining module 602, configured to determine frequency band priority information based on the RFSP ID;
a sending module 603, configured to send frequency band priority information to the terminal, so that the terminal determines the camping frequency band based on the frequency band priority information.
Optionally, the sending module 603 is further configured to receive the updated RFSP ID sent by the MME; determining updated frequency band priority information based on the updated RFSP ID; and sending the updated frequency band priority information to the terminal so that the terminal can update the resident frequency band based on the updated frequency band priority information.
Each module in the base station provided in fig. 6 has a function of implementing each step in the example shown in fig. 2, and achieves the same technical effect as the method for terminal residence shown in fig. 2, and for brevity, no further description is given here.
An embodiment of the present invention further provides a system for a terminal to reside in, where the system may include the mobility management entity shown in fig. 5 and the base station shown in fig. 6.
In addition, embodiments of the present invention may be implemented by providing a computer storage medium. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement the method of terminal residence shown in fig. 1 or the method of terminal residence shown in fig. 2.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method for terminal residence is applied to a Mobile Management Entity (MME), and comprises the following steps:
determining a radio access type/frequency selection priority RFSP identification information ID based on preset service requirement information;
and sending the RFSPID to a base station for the base station to determine frequency band priority information based on the RFSPID, and sending the frequency band priority information to a terminal for the terminal to determine a resident frequency band based on the frequency band priority information.
2. The method of claim 1, wherein after the transmitting the RFSPID to a base station for the base station to determine frequency band priority information based on the RFSPID and transmitting the frequency band priority information to a terminal for the terminal to determine a camping frequency band based on the frequency band priority information, the method further comprises:
updating the RFSPID according to the service requirement information;
and sending the updated RFSPID to the base station.
3. The method of claim 1, wherein prior to the transmitting the RFSPID to the base station, the method further comprises:
sending a terminal position acquisition request to a Home Subscriber Server (HSS);
receiving terminal position information corresponding to the terminal position acquisition request sent by the HSS;
determining the base station based on the terminal location information.
4. The method of claim 3, wherein the sending the terminal location acquisition request to the Home Subscriber Server (HSS) comprises:
sending an authentication data request to the HSS;
receiving authentication data corresponding to the authentication data request sent by the HSS;
and when the authentication aiming at the terminal is completed according to the authentication data, sending the terminal position acquisition request to the HSS.
5. A method for terminal camping is applied to a base station, and comprises the following steps:
receiving RFSPID sent by MME; the RFSPID is information determined by the MME based on preset service requirement information;
determining frequency band priority information based on the RFSPID;
and sending the frequency band priority information to a terminal so that the terminal can determine a resident frequency band based on the frequency band priority information.
6. The method for camping on a terminal according to claim 5, wherein after the sending the band priority information to a terminal for the terminal to determine the camping band based on the band priority information, the method further comprises:
receiving an updated RFSPID sent by the MME;
determining updated frequency band priority information based on the updated RFSPID;
and sending the updated frequency band priority information to the terminal so that the terminal can update the resident frequency band based on the updated frequency band priority information.
7. A mobility management entity, comprising:
the determining module is used for determining RFSPID based on preset service requirement information;
a sending module, configured to send the RFSPID to a base station, so that the base station determines frequency band priority information based on the RFSPID, and send the frequency band priority information to a terminal, so that the terminal determines a camping frequency band based on the frequency band priority information.
8. A base station, comprising:
a receiving module, configured to receive an RFSPID sent by an MME; the RFSPID is information determined by the MME based on preset service requirement information;
a determining module, configured to determine frequency band priority information based on the RFSPID;
and the sending module is used for sending the frequency band priority information to a terminal so that the terminal can determine a resident frequency band based on the frequency band priority information.
9. A system in which a terminal resides, comprising:
the mobility management entity of claim 7 and the base station of claim 8.
10. A computer storage medium having stored thereon computer program instructions which, when executed by a processor, implement a method of a terminal residing according to any one of claims 1-4; or the like, or, alternatively,
the computer program instructions, when executed by a processor, implement a method of terminal residence according to claim 5 or 6.
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| CN113905426A (en) * | 2021-08-30 | 2022-01-07 | 阿里巴巴达摩院(杭州)科技有限公司 | Communication method, device and system |
| CN114423052A (en) * | 2021-12-28 | 2022-04-29 | 中国电信股份有限公司 | Voice fallback method and related equipment |
| CN114449546A (en) * | 2020-11-02 | 2022-05-06 | 中国移动通信集团广东有限公司 | Heterogeneous network anchor point tuning method and system |
| CN113905426B (en) * | 2021-08-30 | 2024-06-07 | 杭州阿里云飞天信息技术有限公司 | Communication method, device and system |
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| CN114449546B (en) * | 2020-11-02 | 2023-09-19 | 中国移动通信集团广东有限公司 | Heterogeneous network anchor point optimization method and system |
| CN113905426A (en) * | 2021-08-30 | 2022-01-07 | 阿里巴巴达摩院(杭州)科技有限公司 | Communication method, device and system |
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